Arguments:
1) char: value
Return Type:
bool
Returns true if the character is a letter or number.
Arguments:
1) char: value
Return Type:
bool
Returns true if the character is a letter.
Arguments:
1) char: value
Return Type:
bool
Returns true if the character is a number.
Arguments:
1) char: value
Return Type:
bool
Returns true if the character is a lowercase letter.
Arguments:
1) char: value
Return Type:
bool
Returns true if the character is a punctuation mark.
Arguments:
1) char: value
Return Type:
bool
Returns true if the character is an uppercase letter.
Arguments:
1) char: value
Return Type:
bool
Returns true if the character is a hexadecimal number (a-f, A-F, 0-9).
Arguments:
1) char: value
Return Type:
char
Returns the character converted to lowercase if possible, otherwise returns itself.
Arguments:
1) char: value
Return Type:
char
Returns the character converted to uppercase if possible, otherwise returns itself.